Improvement in devices for cutting and screw-threading metallic wagon-axles



0. s. ADAMS. Device for Cutting and Screw-Threading MetallicWagon-Axles;

' #IN'VENTOR:

flz/W TTORNBYS;

WITNESSES:

$2; /77/@/ J /wa o/V UNITED STATES PATENT OFFICE.

CHARLES S. ADAMS, OF MARSHFIELD, VERMONT.

' IMPROVEMENT IN DEVICES'FOR CUTTING AND SCREW-THREADING METALLICWAGON-AXLES.

Specification forming part of Letters Patent No. 219,193, datedSeptember 2, 1879 application filed Ma 26, 1879. Y

To all whom it may concern:

Be it known that I, CHARLES S. ADAMS, of Marshfield, in the county ofWashington and State of Vermont, have invented a new and Improved Devicefor Cutting and Screw- Threading Metallic Wagon-Axles, of which thefollowing is a specification.

This invention relates to improvements in the construction and operationof machines for shortening axle-spindles to compensate for the wearingof the wheel-boxes.

The object of these improvements is to make the machine self-feeding,and to enable one burr and one screw-cutting die to be employed upon anysized spindle.

The invention consists of a holder adapted to receive the die and burr,and allow them to.

be set so as to operate upon spindles of various sizes, in combinationwith a feeder composed of a follower set in the die and burr holder,provided with a ratchet engaged by a pawl on the holder, so that as thelatter is turned the follower is turned with it. The follower is placedover a screw-shaft, which is adapted to be fixed to the screw-stud ofthe axle, whereby as the follower is turned by the holder it isscrewedtoward the axle, and thus feeds the burr against the shoulder. The feedis regulated by a device that will be fully described fartheron.

In the accompanying drawings, Figure l'is a front view of theimprovement. Fig. 2 is a longitudinal section on line w or of Fig. 1.Fig. 3 is a cross-section on.line y y of Fig. 2. Figs. 4. and 5represent the screw-cutting die.

Similar letters of reference indicate corresponding parts.

Referringto the drawings, A represents a wheel-plate, having a hole, B,through its center and levers O radiating from its periphery. On oneside of this plate is an elliptical frame,

D, with an elliptical opening through it to the wheel-plate. One edge ofthis opening, on the long side and next to the hole B, is beveledinwardly, as shown at a, andopposite this the face of the frame isprovided with a recess, b,

. in which is pivoted a lock, E, adapted to swing out from the frame,and when in line with it is held down by the finger 0 extending over it.The burr F ismade upon an elliptical plate,

divided transversely through the burr. The

burr-plate is placed between the sides of frame D, so as to rest on thewheel-plate beneath, and has one edge or side beveled to fit under thebeveled side a of the frame, while on the opposite side is a recess, 12,into which the edge of look E projects. By these two devices theburr-plate is held in the holder while the burr is adjusted to differentdiameters of axles by set-screws d d, passed through the ends of frame Dand bearing against the ends at the burr-plate, as clearly shown in Fig.1.

.By this arrangement the burr can be adapted to operate upon any axle upto the size of the hole B in the wheel-plate. The burr thus formed andheld is designed to be placed against the shoulder of the spindle, (thescrewstud on the end of the spindle projecting through the hole B in thewheel-plate,) and to cut the shoulder by being turned against it by thearms 0 when fed forward by the mechanism which will now be described. r

G is a follower, having a hollow center and with a threaded hole throughits outer end or head, while the opposite end is counterbored, and hasan annular projection, 11, which fits into an annular rabbet in thewheel-plate on the side opposite the burr-seat.

H is a screw-shaft, having .a recessed head, e, through which set-screwsf are passed from the outside toward the axis of the shaft. The shaftvis passed through the follower and screwed into the head until arectangular pro j ection, f projects through the head, as shown in Fig.2, when the end of the recessed head is flush with the end of thefollower. On the periphery of the end of the follower next to thewheel-plate is a circular ratchet, g, and to the wheel-plate, just overthis ratchet, is placed a spring-pawl, h, in position to engage the saidratchet, as shown in Fig. 3.

The operation of this part of my invention is as follows: The burr beingset to suit the diameter of the screw-stud on the end of the axle, theholder is placed over the stud with the burr against the shoulder of thespindle. The follower G is then placed in position, and the screw-studof the axle entered in the recess in head 6, and secured therein byscrewing the set-screwsagainst it, thus fastening the screw-shaft firmlyto the end of the spindle. The follower is now screwed up toward 2enemas the Wheel-plate until its projection 01 enters the annular rabbetin the said plate, at which time the ratchet g is under the pawl h andis V engaged by it. Now, by turning the holder by means of the levers O,the pawl, engaging the ratchet g, turns the follower at the same time,and the screw-shaft leads it along toward the end of the axle, andcauses it to force the holder and burr against the shoulder of thespindle, so that the burr is fed up by the follower, and kept in contactwith the shoulder until it cuts away the proper amount of metal.

A regular feeding is kept up by a regulator composed of a head, I, heldupon the projection f of the screw-shaft H. From this head curved arms1' z t t extend over the follower, and their ends rest against theratchet 9, so that as the follower revolves (the arms remain ingstationary like shaft H) the arms lift the pawl, and thus make thefeeding intermittent, but regular, so as to avoid crowding the burr toorapidly against the shoulder.

When the spindle has been sufficiently shortened theholder and followerare removed, the burr removed from the holder, and the screwcutting dieJ inserted in the holder. The plate containing this die is madeprecisely like the burr-plate, and is placed in the holder and securedthere in the same way, and ad justed by set-screws d. This screw-cuttingdie is now placed over the screw-stud of the spindle and turned bytheholder for the purpose of cutting the screw-thread on the stud up to thenew shoulder formed by the first operation.

This device enables me to cut the new shoulder on the'end of the spindleevenly and rapidly, and thus adapt it to tighten up the worn box, sothat the wheel will run as evenly and true as in the first instance.

Having thus described my invention, I claim as new and desire to secureby Letters Patent- 1. In combination with the holder, the-follower G,screwed over shaft H, with recessed head 0, for the reception of thestud of the spindle, and having a ratchet, g, at the end next the holderin position to be engaged by the pawl h on the holder, whereby, when theh older is turned, the pawl, engaging the ratchet, turns the followerand screws it up on the shaft H against the holder, feeding the burragainst the shoulder of the spindle, substantially as described.

2. The head I, passed over the projection f of the screw-shaft H, andprovided with arms t, having their ends resting against the ratchet g,in combination with the plate A, the pawl h, and follower G, for'thepurpose of maintaining a regular intermittent feed, substantially asdescribed.

CHARLES S. ADAMS.

Witnesses:

SAMUEL MEADER, J r., ROYAL MOORE.

